Preparation method of PMI (Polymethacrylimide) foam plastic

A technology of foam plastics and slurry, which is applied in the field of plastic foam profile manufacturing, can solve the problems of high cost and waste of materials, and achieve the effect of improving utilization rate and production efficiency

Inactive Publication Date: 2019-02-05
威海维赛新材料科技有限公司
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AI Technical Summary

Benefits of technology

This patented technology allows for creating special shapes by filling them with specific types or sizes of polymers that produce plugs when heated up. These plugged pieces then form tiny bubbles inside another material called an expandible resin (EPM). By adjusting their size based on how heavy they're weighs down, this new method enables producing various shaping objects without requiring expensive tools like dies.

Problems solved by technology

This patented technical problem addressed in this patents relates to producing customizable or nonstandard plate shapes with specific properties such as strength, flexibility, durability, etc., without wasteful secondary operations during the final product formation processes.

Method used

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  • Preparation method of PMI (Polymethacrylimide) foam plastic
  • Preparation method of PMI (Polymethacrylimide) foam plastic

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preparation example Construction

[0025] The invention provides a kind of preparation method of PMI foamed plastics, in this method, the present invention specifically comprises steps:

[0026] S1. Synthesize spare slurry, use methacrylic acid, methacrylonitrile and / or acrylonitrile as monomers for backup, and use C3-C8 alcohols or carbonamide, formamide, diisoamyl phthalate as foam The agent is used for standby, and the high-temperature curing resin or adhesive is used as an additive for standby, and the oil-soluble free radical initiator, monomer, and foaming agent are stirred and mixed at room temperature to make a standby slurry;

[0027] S2. Prepare a foamable copolymer material in a water bath, inject the spare slurry obtained in step 1 into a polymerization mold, and polymerize in a constant temperature water bath to make a foamable copolymer material. In this step, the polymerization mold cavity is used The cuboid structure is designed, so that the foamable copolymer material prepared by the constant te

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Abstract

The invention discloses a preparation method of PMI (Polymethacrylimide) foam plastic. The preparation method comprises the following steps: S1, blending and mixing an oil-soluble free radical initiator, a monomer, a foaming agent and an additive to obtain a spare sizing agent; S2, polymerizing the mixture in a constant-temperature water bath to obtain a foamable copolymer material; S3, smashing the foamable copolymer material to obtain foamable copolymer particles; S4, directly pouring the foamable copolymer particles into a forming mold according to a proportion for foaming, and filling molds of any shapes with the foamable copolymer particles according to different density demands for foaming to obtain PMI foam products of corresponding mold shapes. By adopting the preparation method, the conventional process is improved, the production demands of special-shaped products can be met, special-shaped molds can be directly used for foaming according to the profiles of the special-shapedproducts, the utilization rates of raw materials are improved, and meanwhile the production efficiency can be improved greatly.

Description

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Claims

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Application Information

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Owner 威海维赛新材料科技有限公司
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